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Design of a microscope auto-focusing device based on multi-stage leaf spring
Liu Y.; Wu K.; Xu D.; Xu Q.
Conference NameIEEE International Conference on Information and Automation (ICIA)
Source Publication2014 IEEE International Conference on Information and Automation, ICIA 2014
Conference DateJUL 28-30, 2014
Conference PlaceHailar, PEOPLES R CHINA

In this paper, the design procedure of an auto-focusing device for a microscope is presented. To obtain a long focusing distance, a new flexure positioning mechanism is devised based on multi-stage leaf springs. The proposed device allows a precise focusing without friction and backlash effects. A voice coil motor is employed to drive the positioning mechanism. The stiffness model and resonant-frequency model are developed analytically. These models are employed for an architectural optimization of the mechanism parameters to maximize the resonant frequency under the driving stroke and force constraints. The performance of the designed flexure mechanism is validated through finite-element analysis (FEA) simulation investigations. Results show that the positioning mechanism enables a long focusing range over 10 mm with a high resonant frequency over 450 Hz, which allows an auto-focusing operation with rapid response. Moreover, the performance of the auto-focusing device is validated through experimental studies on a fabricated prototype.

KeywordAuto-focusing Device Flexure Mechanism Optimal Design Positioning Mechanism
URLView the original
Indexed BySCI
WOS Research AreaAutomation & Control Systems ; Computer Science
WOS SubjectAutomation & Control Systems ; Computer Science, Information Systems
WOS IDWOS:000363815200001
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Citation statistics
Cited Times [WOS]:12   [WOS Record]     [Related Records in WOS]
Document TypeConference paper
AffiliationUniversidade de Macau
Recommended Citation
GB/T 7714
Liu Y.,Wu K.,Xu D.,et al. Design of a microscope auto-focusing device based on multi-stage leaf spring[C],2014:1-6.
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